Github user rdblue commented on the issue:
https://github.com/apache/spark/pull/22547
@jose-torres, I don't mean that the primary purpose of the v2 API is for
catalog integration, I mean that the primary use of v2 is with tables that are
stored in some catalog. So we should make sure that the plan and design work
well with catalog tables.
Another reason that catalog tables are important is that the v2 plans
require a catalog for consistent behavior. So catalogs are important and I
think will affect the implementation details.
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